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Allow uploading mkv files #1443

Description

@baryluk

Just like mov or mp4 are already supported, mkv should be supported. mkv is a default format produced by obs for example, and it is often useful to create few second clips to show issues when reporting bugs.

If it can't be played by embedded player, it still should be possible to download such files.

Activity

  1. iquat commented on Sep 3, 2024

    @iquat

    I've just ran into this issue with OBS recording something irreversible happening on my screen (see notepad-plus-plus/notepad-plus-plus#12473)

  2. iquat commented on Sep 3, 2024

    @iquat

    Workaround within OBS: record in .mkv, and then remux into .mp4 (File -> Remux Recordings)

  3. BujuArena commented on Oct 27, 2024

    @BujuArena

    Compared to MP4, MKV has more features, compatibility, and better tools (especially with the existence of the mkvtoolnix GUI). One of the best features of MKV over MP4 is that the video can be played before encoding is complete, enabling getting a quick preview before committing to the full encoding time. Currently I'm using MKV during encoding and then remuxing to MP4 after the encoding is complete just for attaching to github, but I would prefer to avoid the final step since MKV is the more modern and useful format overall. Fixing this seems like it would be a relatively simple change; basically just adding "mkv" to the file extension allow list. Thanks.

  4. zaporter-work commented on Jan 6, 2025

    @zaporter-work

    For the next person who runs into this, I convert my mkvs to mp4 via ffmpeg -i "recording.mkv" -map 0 -c copy -c:a aac "recording.mp4"

    (but I also wish github supported mkv)

  5. github-actions commented on Mar 8, 2025

    @github-actions

    This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

  6. BujuArena commented on Mar 8, 2025

    @BujuArena

    Compared to MP4, MKV has more features, compatibility, and better tools (especially with the existence of the mkvtoolnix GUI). One of the best features of MKV over MP4 is that the video can be played before encoding is complete, enabling getting a quick preview before committing to the full encoding time. Currently I'm using MKV during encoding and then remuxing to MP4 after the encoding is complete just for attaching to github, but I would prefer to avoid the final step since MKV is the more modern and useful format overall. Fixing this seems like it would be a relatively simple change; basically just adding "mkv" to the file extension allow list. Thanks.

  7. github-actions commented on May 8, 2025

    @github-actions

    This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

  8. BujuArena commented on May 8, 2025

    @BujuArena

    Please mark this not able to be marked stale until mkv uploading is implemented. Thank you.

  9. github-actions commented on Jul 8, 2025

    @github-actions

    This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

  10. BujuArena commented on Jul 8, 2025

    @BujuArena

    This is not addressed yet and it'll be cared about until addressed.

  11. 14 remaining items

  12. BujuArena commented on Mar 17, 2026

    @BujuArena

    .

  13. github-actions commented on May 16, 2026

    @github-actions

    This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

  14. BujuArena commented on May 17, 2026

    @BujuArena

    .

  15. github-actions commented on Jul 18, 2026

    @github-actions

    This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

  16. BujuArena commented on Jul 18, 2026

    @BujuArena

    .

  17. github-actions commented on Sep 17, 2026

    @github-actions

    This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

  18. BujuArena commented on Sep 17, 2026

    @BujuArena

    .

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